const http = require('http')
const fs = require('fs')
const path = require('path')
const server = http.createServer()
server.on('request',(req,res)=>{
    const url=req.url
    const fpath=path.join(__dirname,url)
    fs.readFile(fpath,'utf8',(err,dataStr)=>{
        if(err){
            return res.end('404 Not Found')
        }
        res.end(dataStr)
    })
    // let content='404 not Found'
    // if(url === '/' || url === '/index.html'){
    //     content='<h1>首页</h1>'
    // }else if(url === '/about.html'){
    //     content='<h1>关于页面</h1>'
    // }
    // res.setHeader('Content-Type','text/html;charset=utf-8')
    // res.end(content)
})
server.listen(80,function(){
    console.log('server running at http://127.0.0.1')
})